*{
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}
body{
    display: flex;
    align-items: center;
    justify-content: center;
    height: 100vh;
}
#container{
    width: 492px;
    margin: auto;
}
h3{
    text-align: center;
    margin: 20px;
}

#week,
#day1{
    display: flex;
    flex-wrap: wrap;
    border: 1px solid #ccc;
}
#day1 span,
#week span{
    width: 70px;
    height: 40px;
    line-height: 40px;
    text-align: center;
    box-shadow: 1px 1px 1px rgba(0,0,0,0.4);
}
.h{
    color: #999;
}
.today{
    color: #0000ff;
    background: #4eacf4;
}